Circular saw device



Nov. 5, 1946. RVALEN E v 2,410,4 1

CIRCULAR SAW DEVICE Filed May 11, 1945.

IN VEN TOR.

Pa fr/ck llenflhg mh ww ATTbRNEY Patented Nov. 5, 1946 Patrick Valentine, New York, N. Y.

Application May 11, 1945, Serial No. 593,178

1 Claim.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) This invention relates to a safety device for use in conjunction with circular power saws.

In conducting ripping operations on narrow pieces of stock, it is common practice to feed the work into the saw by pushing it with a piece of scrap wood, the saw blade cutting well into the pushing block or stick before it cuts completely through the work piece. If the attention of the operator strays he may allow the saw to cut completely through the pushing block and into his hand, or if his hand slips from the pushing block it may move directly into the saw.

It is an object of this invention to provide a safety device for holding and impelling work during ripping operations with a power saw, with which device the hand of the operator moves 'in a path parallel to that of the work piece but offset therefrom sufficiently to preclude contact between the hand and the saw.

Another object of this invention is to provide a safety device of the character described, in

the use of which the direction of movement of the operator's hand is not toward the cutting edge of the saw.

Still another object of this invention is to provide a safety device of the character described which is adapted to hold and impel pieces of stock of varying thicknesses without adjustment.

Further objects and advantages of this invention, as well as its construction, arrangement and operation, will be apparent from the following description and claim in connection with the accompanying drawing, in which,

Figure 1 is a side elevation of the device of this invention, shown in its relation with a piece of wood being ripped by a power saw.

Figure 2 is a front end elevation of the devic of this invention.

Referring to the drawing in detail, II represents the work table of a conventional power saw, and I2 is the upper portion of a circular saw blade protruding through work table I I. Behind saw blade I2 is a conventional fence or guide I3, parallel to saw blade I2 and spaced therefrom in conformance with the thickness desired in the product of the stock being worked upon, shown as work piece I4.

The device of this invention comprises two U-shaped clips I5, spaced by and joined to plate I6. Hand grip I1 is secured to the surface of plate I6 opposite to that to which are attached clips I5. Clips I5 and plate I6 may be conveniently made of steel and joined together by welding, or in any other conventional manner.

Hand grip I1 is preferably made of wood, although it will be apparent that metal, plastic or other material may be used. If made of wood, hand grip Il may be affixed to plate I6 by a plurality of wood screws I8, extending into hand grip I I through countersunk holes provided therefor in plate I6.

One leg of one of clips I5 is longer than the others and is adapted to engage work piece l4 by being formed into a series of steps I9, of approximately In operation, the device of this invention is gripped by means of hand grip I1 and placed upon the fence or guide I3, each of clips I5 having one leg on either side of guide I3. It will be apparent that the distance between the legs of clips I5 will desirably be such as to permit the device to slide smoothly on the guide I3 with but little side play. Hand grip I! is preferably so shaped as to be comfortably gripped by the palm and fingers of the hand, and of a convenient length for that purpose, six inches being a suitable length.

Work piece I4 is then placed against guide I3, and its adjacent corner is engaged by one of steps I9 (Figure 1). With the safety device so engaged with work piece I4, the work piece I4 may be held down against work table II and pushed toward saw blade I2 by holding down hand grip I1 and moving it along the top of guide I3. It will be apparent that the horizontal surface of one of steps I9 bears on the top of work piece 14, while the vertical surface of an adjacent step I9 bears on the end of work piece I4, in this manner allowing work piece I4 to be simultaneously held down and impelled toward the saw. Several of steps I9 are provided, to be used with varying thicknesses of work sothat plate I6 and hand grip U will not ride at too great an angle relative to the top surface of guide I3. It has been found desirable to grip the work piece I4 with the highest of steps I9 which will still keep the'lowest horizontal surface of the stepped leg out of contact with the work table I I.

The stepped leg I5 of the safety device of this invention permits work piece I4 to be pushed completely past the saw blade I2, the stepped leg passing between saw blade I2 and guide I3, without the operators hand ever approaching dangerously close to saw blade I2. By gripping hand grip I I, the operator may maintain a firm grip on the material being cut, and there is no danger of the operators hand touching the saw in the event the work slips out from under the stepped leg. Using this invention, the operators hand wiil be continually pushing in a direction parallel to the top surface of guide I 3 and above it, so that in the event the hand should slip from hand grip I! it will pass considerably above saw blade l2, and not into it.

It is to be understood that various modifications and changes maybe made in this invention without departing from the spirit and scope thereof as set forth in the appended claim.

The invention described herein may be manufactured and used by or for the Government of 7 10 provided with a plurality of steps at its extremity.

PATRICK VALENTINE. 

